39630972 has 24 divisors (see below), whose sum is σ = 92961792. Its totient is φ = 13140400.

The previous prime is 39630971. The next prime is 39630991. The reversal of 39630972 is 27903693.

It is a super-2 number, since 2×39630972² = 3141227883329568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39630972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39630971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6354 + ... + 10937.

It is an arithmetic number, because the mean of its divisors is an integer number (3873408).

Almost surely, 2^39630972 is an apocalyptic number.

It is an amenable number.

39630972 is an abundant number, since it is smaller than the sum of its proper divisors (53330820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39630972 is a wasteful number, since it uses less digits than its factorization.

39630972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17489 (or 17487 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 39630972 is about 6295.3134949739. The cubic root of 39630972 is about 340.9402233807.

The spelling of 39630972 in words is "thirty-nine million, six hundred thirty thousand, nine hundred seventy-two".